20211100222109 has 2 divisors, whose sum is σ = 20211100222110. Its totient is φ = 20211100222108.

The previous prime is 20211100222099. The next prime is 20211100222133. The reversal of 20211100222109 is 90122200111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14178402838084 + 6032697384025 = 3765422^2 + 2456155^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211100222109 - 2⁸ = 20211100221853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211100272109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105550111054 + 10105550111055.

It is an arithmetic number, because the mean of its divisors is an integer number (10105550111055).

Almost surely, 2^{20211100222109} is an apocalyptic number.

It is an amenable number.

20211100222109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211100222109 is an equidigital number, since it uses as much as digits as its factorization.

20211100222109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 20211100222109 in words is "twenty trillion, two hundred eleven billion, one hundred million, two hundred twenty-two thousand, one hundred nine".